GMAT (Graduate Management Admission Test) Question:
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A 4 cm cube is cut into 1 cm cubes. What is the percentage increase in the surface area after such cutting?

Answer:

1. 4%
2. 300%
3. 75%
4. 400%

Ans : B

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A regular hexagon is inscribed in a circle of radius r cms. What is the perimeter of the regular hexagon?If the diagonal and the area of a rectangle are 25 m and 168 m2, what is the length of the rectangle?